#include<iostream.h>
#include<stdio.h>
#include<conio.h>

 void main()
{
	int diameter=10;
   float luas;
   const float phi=3.14;

 printf("Diket =\n");
 printf("Diameter = %d\n",diameter);
 printf("phi = %f\n",phi);
 printf("Ditanya = Luas\n");
 printf("Jawab = Luas =phixrxr\n");
 luas=phi*(diameter/2)*(diameter/2);
 printf("Luas =%fx(%dx%d)\n",phi,diameter/2,diameter/2);
 printf("Luas = %f\n",luas);
 getch();

 }
